Common use of FORM OF OFFICER’S CERTIFICATE Clause in Contracts

FORM OF OFFICER’S CERTIFICATE. This Officer’s Certificate (“Certificate”) is being delivered pursuant to Section 8(d) of that certain Purchase Agreement dated as of March 4, 2019, (“Purchase Agreement”), by and between IDERA PHARMACEUTICALS, INC., a Delaware corporation (the “Company”), and LINCOLN PARK CAPITAL FUND, LLC (the “Investor”). Terms used herein and not otherwise defined shall have the meanings ascribed to them in the Purchase Agreement. The undersigned, ___________, ______________ of the Company, hereby certifies as follows:

FORM OF OFFICER’S CERTIFICATE. This Officer’s Certificate (“Certificate”) is being delivered pursuant to Section 8(d8(e) of that certain Purchase Agreement dated as of March 4May __, 20192011, (“Purchase Agreement”), by and between IDERA PHARMACEUTICALSGOLDEN PHOENIX MINERALS, INC., a Delaware Nevada corporation (the “Company”), and LINCOLN PARK CAPITAL FUND, LLC (the “Investor”). Terms used herein and not otherwise defined shall have the meanings ascribed to them in the Purchase Agreement. The undersigned, ___________, ______________ of the Company, hereby certifies as follows:

FORM OF OFFICER’S CERTIFICATE. This Officer’s Certificate (“Certificate”) is being delivered pursuant to Section 8(d) of that certain Purchase Agreement dated as of March 4December 22, 20192010, (“Purchase Agreement”), by and between IDERA PROVECTUS PHARMACEUTICALS, INC., a Delaware Nevada corporation (the “Company”), and LINCOLN PARK CAPITAL FUND, LLC (the “Investor”). Terms used herein and not otherwise defined shall have the meanings ascribed to them in the Purchase Agreement. The undersigned, ___________, ______________ of the Company, hereby certifies as follows:

FORM OF OFFICER’S CERTIFICATE. This Officer’s Certificate (“Certificate”) is being delivered pursuant to Section 8(d6(h) of that certain Equity Line Purchase Agreement dated as of March 4May 18, 20192020, (“Purchase Agreement”), by and between IDERA PHARMACEUTICALSEndonovo Therapeutics, INC.Inc., a Delaware corporation (the “Company”), and LINCOLN PARK CAPITAL FUNDCavalry Fund I LP, LLC a Delaware limited partnership (the “Investor”). Terms used herein and not otherwise defined shall have the meanings ascribed to them in the Purchase Agreement. The undersigned, ___________, ______________ of the Company, hereby certifies as follows:

FORM OF OFFICER’S CERTIFICATE. This Officer’s Certificate (“Certificate”) is being delivered pursuant to Section 8(d) of that certain Purchase Agreement dated as of March 424, 20192020, (“Purchase Agreement”), by and between IDERA PHARMACEUTICALSHTG MOLECULAR DIAGNOSTICS, INC., a Delaware corporation (the “Company”), and LINCOLN PARK CAPITAL FUND, LLC (the “Investor”). Terms used herein and not otherwise defined shall have the meanings ascribed to them in the Purchase Agreement. The undersigned, ___________, ______________ of the Company, hereby certifies as follows: